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- Coin weighing problem 2 answers
You're working in a bank and you've been given ten piles of coins. One of the piles, you've been told is a pile of fake coins. The real coins are 100g in weight, while the fake coins are just 90g.
Now, you want to spend the least amount of time weighing the coins to get on with the rest is of your job, so what is the least amount of weighings to identify the fake pile of coins?